Let's see if we can get this thread back on a constructive tangent.
From hanging around here on FN, one might start thinking that J & J's were the only vacuum tube on the planet. Even though they're a excellent-sounding tubes, and very reliable, there are a lot of choices out there. Here's a straight take on a few brands of EL-84 I've used recently.
Prior to re-tubing my Classic 30 with J & J's, I was running Groove Tubes (both EL84's and 12AX-7's). The big difference I noted between the GT's and the J & J's was the touch-responsiveness for clean and lower gain tones, and warmer mids and highs (think Frampton). The J & J's tended to have a smoother, more even break-up, which I also thought lent itself more effectively to pedal usage. The Groove Tubes were slightly brighter-sounding, quicker to break-up, with a bit more edge on the mids and highs (think Slash).
I am currently running an Electro Harmonix EL-84 EH in my Valve Jr. head, which is paired with a Groove Tubes 12AX7-M, and that duo together creates some pretty spectacular tones (think early 70's Townshend). To my ears, the EH adds some much needed bite to the Jr's somewhat-middy timbre, and the GT 12AX7-M provides just the right amount of warmth to even things out. The J & J EL84 I'm running in my Valve Jr. combo isn't quite as bright as the EH in my head, though it does seem to carry a bit more weight on the bottom end. The EH's tend to pull a little more current, too, which I think would be a plus for amps with a Vox-like circuit design - like a Traynor.
I've heard good things about the new Groove Tubes EL84-S's, so you might want to check them out, too. Apparently, the new tube design is much warmer than its predacessor, not to mention that it carries a bit more "oomph" power-wise.
I'd guess that you'd be satisfied with just about anything we've mentioned, to include the venerable J & J's - - which I, of course, fully endorse. For most newer tube amps (1990 - present), changing tubes is a simple, cost-effective way to experiment with tone. With the exception of pedals & pick-ups, there's probably isn't an easier way to give your sound a complete make-over.
BTW 69SL - hope you have better luck with this re-tube than the one you just did on your Vibro Toast . . . er, I mean Vibro Champ!
